SPM in Battlefield 3

It calculate you normal points per minute also adding in medals and ribbons you have earned.  You have 476 hrs so it would take some major grinding to change your score per minute even by the slightest

Best way to bring your score per minute up is play smaller maps like close quarters and also play more on double xp weekends... Medic class revives get them up also

Playing Metro CQ and either spamming explosives or healing/reviving is a good way. Spotting with the MAV on a 64man(PC) TDM map gives fast EXP. Playing in a tank all game.

Consequentially, SPM, kdr, and w/l are really not important. All can be boosted without personal effort.